J.S.Bach's Allegro, 3rd movement from G Minor Flute Sonata, BWV 1020.
This score is the basis of "Hum Bach", the Jazz electric flute adaptation composed and performed by Lee McClure which can be heard at: https://archive.org/details/HumBachBWV10203rdMvtAllegro
The recording loosely follows the score. The second page contains edits of the original.
Research shows that the G Minor Flute Sonata is attributed to J.S.Bach but is more likely to have been composed by his son, C.P.E. Bach and is catalogued as "Violin Sonata in G minor", H.542.5, from the approximate year 1734.